.title {
    display: flex;
    margin-bottom: 10px;
    justify-content: space-between;
    color: gray;
}
.contain {
width: 1200px;
height: 600px;
margin: 0 auto;
margin-top: 20px;
padding: 10px 5px;
overflow: hidden;
background-color: rgb(245, 245, 245);
}
.x1{
margin-left: 1050px;
color: gray;
text-decoration: none;
}
.left {
    width: 20%;
    height: 600px;
    overflow: hidden;
    float: left;
  }
.left img{
    width: 100%;
}  
  .phone-list {
    width: 79%;
    float:left;
    margin-left: -25px;
    margin-top: -13px;
  }
  
  .content {
    width: 100%;
    overflow: hidden;
  }
  
  .phone {
    width: 23%;
    float: left;
    box-sizing: border-box;
    padding: 10px;
    text-align: center;
  }
  
  ul {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    width: 100%;
  }
  
  li {
    list-style: none;
    width: 100%;
    height: 49%;
    margin-right: 15px;
    margin-bottom: 10px;
    background-color: #fff;
  }

.phone-img {
    width: 70%;
    margin: 20px 0;
}
.phone-title {
font-size: 16px;
font-weight: bold;
margin-bottom: 5px;
}
.phone-des {
font-size: 14px;
margin-top: 5px;
color: rgb(221, 221, 222);
}
.phone-price {
margin-top: 15px;
font-size: 14px;
color: orange;
}
.phone-oldprice {
    color: #ccc;
    margin-left: 5px;
    text-decoration: line-through;
}